/* ==========================================================
   도색연구소 랜딩페이지 스타일
   톤앤무드: 절제된 모노톤 + 단일 액센트, 여백 중심의 에디토리얼 톤
   (레퍼런스: LX Z:IN — 화이트/블랙 베이스, 사진 중심 풀블리드 히어로,
    가는 트래킹의 미니멀 내비게이션, 색은 최소로만 사용)
   컬러 시스템 및 IA는 GUIDELINE.md 참고
   ========================================================== */

:root{
  --bg:#FAFAF9;
  --bg-card:#FFFFFF;
  --line:#E5E3DE;
  --dark:#141414;
  --dark-2:#1E1E1E;
  --ink:#181818;
  --muted:#585858;
  --muted-on-dark:#A9A9A4;
  --accent:#A8592E;
  --accent-dark:#8B4623;
  --font: "Pretendard", -apple-system, BlinkMacSystemFont, "Malgun Gothic", sans-serif;

  --container: 1140px;
  --radius: 6px;
  --radius-lg: 8px;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  font-family:var(--font);
  color:var(--ink);
  background:var(--bg);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
ul,ol{ list-style:none; margin:0; padding:0; }
h1,h2,h3,p{ margin:0; }
svg{ width:100%; height:100%; }

.inner{
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}

.only-pc{ display:inline; }

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:13px 26px;
  border-radius:var(--radius);
  font-weight:600;
  font-size:14.5px;
  letter-spacing:-.01em;
  white-space:nowrap;
  transition:background .15s ease, border-color .15s ease, color .15s ease;
  border:1px solid transparent;
}
.btn-primary{
  background:var(--accent);
  color:#fff;
}
.btn-primary:hover{ background:var(--accent-dark); }
.btn-ghost{
  background:transparent;
  color:var(--ink);
  border-color:var(--line);
}
.btn-ghost:hover{ border-color:var(--ink); }
.btn-outline{
  background:transparent;
  color:#fff;
  border-color:rgba(255,255,255,.55);
}
.btn-outline:hover{ border-color:#fff; }
.btn-lg{ padding:16px 32px; font-size:15.5px; }
.btn-block{ width:100%; }

/* ---------- Header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(250,250,249,.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.site-header .inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:76px;
}
.logo{
  font-size:19px;
  font-weight:700;
  letter-spacing:-.01em;
}
.logo-dot{ color:var(--accent); }
.gnb{
  display:flex;
  gap:36px;
}
.gnb a{
  font-size:14px;
  font-weight:500;
  letter-spacing:.01em;
  color:var(--muted);
  padding-bottom:4px;
  border-bottom:1px solid transparent;
}
.gnb a:hover{ color:var(--ink); border-color:var(--ink); }
.header-cta{ display:flex; gap:10px; }
.hamburger{
  display:none;
  flex-direction:column;
  gap:5px;
  background:none;
  border:none;
  cursor:pointer;
  padding:6px;
}
.hamburger span{
  width:22px; height:1.5px; background:var(--ink);
}
.mnb{
  display:none;
  flex-direction:column;
  gap:2px;
  padding:8px 24px 20px;
  border-top:1px solid var(--line);
  background:var(--bg);
}
.mnb a{
  padding:14px 4px;
  font-size:15px;
  color:var(--ink);
  border-bottom:1px solid var(--line);
}
.mnb .btn{ margin-top:10px; }
.site-header.nav-open .mnb{ display:flex; }

/* ---------- Section shared ---------- */
.section{ padding:120px 0; }
.section.dark{ background:var(--dark); color:#fff; }
.section-eyebrow{
  font-size:13px;
  font-weight:600;
  color:var(--accent);
  letter-spacing:.08em;
  text-transform:uppercase;
  margin-bottom:16px;
}
.section-eyebrow.light{ color:#C98A65; }
.section-title{
  font-size:32px;
  font-weight:700;
  letter-spacing:-.02em;
  line-height:1.42;
  margin-bottom:20px;
}
.section-title.light{ color:#fff; }
.section-desc{
  font-size:16px;
  color:var(--muted);
  max-width:640px;
  line-height:1.75;
}
.section-desc.light{ color:var(--muted-on-dark); }

/* ---------- Hero ---------- */
.hero{
  position:relative;
  overflow:hidden;
  min-height:88vh;
  display:flex;
  align-items:center;
  background:var(--dark);
  color:#fff;
  padding:160px 0 96px;
}
.hero-media{
  position:absolute;
  inset:0;
  background:
    radial-gradient(ellipse 60% 50% at 82% 18%, rgba(168,89,46,.28), transparent 60%),
    radial-gradient(ellipse 55% 60% at 15% 100%, rgba(255,255,255,.05), transparent 55%),
    linear-gradient(155deg, #101010 0%, #1b1b1a 45%, #141414 100%);
}
.hero-media::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:repeating-linear-gradient(115deg, rgba(255,255,255,.025) 0 1px, transparent 1px 3px);
  mix-blend-mode:overlay;
}
.hero-inner{ position:relative; max-width:640px; }
.eyebrow{
  font-size:13px; font-weight:600; color:#C98A65;
  letter-spacing:.1em;
  text-transform:uppercase;
  margin-bottom:22px;
}
.hero h1{
  font-size:46px;
  font-weight:700;
  letter-spacing:-.03em;
  line-height:1.4;
  margin-bottom:26px;
  color:#fff;
}
.hero h1 em{ color:#D98552; font-style:normal; }
.hero-desc{
  font-size:17px;
  color:var(--muted-on-dark);
  line-height:1.75;
  margin-bottom:38px;
}
.hero-cta{ display:flex; gap:12px; margin-bottom:40px; flex-wrap:wrap; }
.hero-trust{
  display:flex;
  gap:24px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--muted-on-dark);
  padding-top:28px;
  border-top:1px solid rgba(255,255,255,.14);
}
.hero-trust li{
  display:flex; align-items:center; gap:7px;
}
.hero-trust li::before{
  content:"";
  width:5px; height:5px;
  background:#C98A65;
  flex:none;
}

/* ---------- Pain ---------- */
.pain-list{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:1px;
  margin-top:52px;
  background:var(--line);
  border:1px solid var(--line);
}
.pain-list li{
  background:var(--bg-card);
}
.pain-photo{
  aspect-ratio:4/3;
  overflow:hidden;
  background:var(--line);
}
.pain-photo img{
  width:100%; height:100%;
  object-fit:cover;
  filter:grayscale(.15);
}
.pain-list p{ font-size:14.5px; color:var(--ink); line-height:1.6; padding:22px 24px 26px; }

/* ---------- Services ---------- */
.service-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:1px;
  margin-top:48px;
  background:var(--line);
  border:1px solid var(--line);
}
.service-card{
  background:var(--bg-card);
  padding:38px 28px;
  transition:background .2s ease;
}
.service-card:hover{ background:#F5F3EF; }
.service-icon{
  width:34px; height:34px;
  color:var(--accent);
  margin-bottom:24px;
}
.service-card h3{ font-size:18px; font-weight:700; margin-bottom:12px; letter-spacing:-.01em; }
.service-card p{ font-size:14.5px; color:var(--muted); line-height:1.65; }

/* ---------- Process ---------- */
.process-list{
  display:grid;
  grid-template-columns:repeat(5,1fr);
  gap:1px;
  margin-top:56px;
  background:rgba(255,255,255,.1);
}
.process-list li{
  padding:30px 20px;
  background:var(--dark);
}
.step-num{
  display:block;
  font-size:13px;
  font-weight:600;
  letter-spacing:.06em;
  color:#C98A65;
  margin-bottom:20px;
}
.process-list h3{ font-size:17px; font-weight:700; margin-bottom:10px; color:#fff; letter-spacing:-.01em; }
.process-list p{ font-size:13.5px; color:var(--muted-on-dark); line-height:1.65; }

/* ---------- Works ---------- */
.works-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:2px;
  margin-top:48px;
}
.work-thumb{
  aspect-ratio:4/3;
  display:flex;
  align-items:center;
  justify-content:center;
  color:rgba(255,255,255,.7);
  font-size:12px;
  font-weight:600;
  letter-spacing:.12em;
  position:relative;
}
.thumb-a, .thumb-b, .thumb-c{
  background:
    radial-gradient(ellipse 70% 60% at 30% 20%, rgba(255,255,255,.06), transparent 60%),
    linear-gradient(160deg, #2b2b29 0%, #1a1a19 100%);
}
.work-label{
  margin-top:18px;
  font-size:15px;
  color:var(--ink);
  font-weight:600;
}
.work-label em{ color:var(--muted); font-style:normal; font-weight:400; font-size:13px; margin-left:8px; }

/* ---------- Price ---------- */
.price-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:1px;
  margin-top:48px;
  background:var(--line);
  border:1px solid var(--line);
}
.price-card{
  position:relative;
  background:var(--bg-card);
  padding:40px 30px;
  text-align:left;
}
.price-card.featured{ background:#F5F3EF; }
.badge{
  display:inline-block;
  border:1px solid var(--accent);
  color:var(--accent);
  font-size:11.5px;
  font-weight:600;
  letter-spacing:.04em;
  padding:4px 10px;
  border-radius:999px;
  margin-bottom:18px;
}
.price-card h3{ font-size:20px; font-weight:700; margin-bottom:6px; letter-spacing:-.01em; }
.price-sub{ font-size:13px; color:var(--muted); font-weight:500; margin-bottom:20px; letter-spacing:.01em; }
.price-desc{ font-size:14.5px; color:var(--muted); line-height:1.65; margin-bottom:26px; min-height:44px; }
.price-amount{ font-size:18px; font-weight:700; color:var(--ink); padding-top:22px; border-top:1px solid var(--line); }
.price-note{ margin-top:24px; font-size:13px; color:var(--muted); }

/* ---------- Trust ---------- */
.trust{ background:#F2F0EB; }
.trust-inner{
  display:grid;
  grid-template-columns:0.85fr 1.15fr;
  gap:64px;
  align-items:start;
}
.trust-list{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
}
.trust-list li{
  background:var(--bg-card);
  padding:30px 26px;
}
.trust-list h3{
  font-size:16px; font-weight:700; margin-bottom:12px;
  letter-spacing:-.01em;
}
.trust-list p{ font-size:14px; color:var(--muted); line-height:1.65; }

/* ---------- FAQ ---------- */
.faq-list{ margin-top:44px; max-width:760px; }
.faq-item{
  border-bottom:1px solid var(--line);
  padding:22px 0;
}
.faq-item summary{
  cursor:pointer;
  font-size:16px;
  font-weight:600;
  letter-spacing:-.01em;
  list-style:none;
  display:flex;
  justify-content:space-between;
  align-items:center;
}
.faq-item summary::-webkit-details-marker{ display:none; }
.faq-item summary::after{
  content:"+";
  font-size:19px;
  font-weight:300;
  color:var(--accent);
  margin-left:16px;
  flex:none;
}
.faq-item[open] summary::after{ content:"–"; }
.faq-item p{
  margin-top:16px;
  font-size:14.5px;
  color:var(--muted);
  line-height:1.7;
}

/* ---------- Contact ---------- */
.contact-channels{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:1px;
  margin:48px 0 52px;
  background:var(--line);
  border:1px solid var(--line);
}
.channel-card{
  background:var(--bg-card);
  padding:28px 26px;
  display:flex;
  flex-direction:column;
  gap:6px;
  transition:background .2s ease;
}
.channel-card:hover{ background:#F5F3EF; }
.channel-icon{ width:26px; height:26px; color:var(--ink); margin-bottom:10px; }
.channel-card strong{ font-size:16px; letter-spacing:-.01em; }
.channel-card span{ font-size:13.5px; color:var(--muted); }

.quote-form{
  max-width:720px;
  background:var(--bg-card);
  border:1px solid var(--line);
  padding:40px;
}
.form-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:18px;
  margin-bottom:18px;
}
.quote-form label{
  display:flex;
  flex-direction:column;
  gap:8px;
  font-size:13.5px;
  font-weight:600;
  color:var(--ink);
}
.form-full{ margin-bottom:22px; }
.quote-form input,
.quote-form select,
.quote-form textarea{
  font-family:var(--font);
  font-size:14.5px;
  padding:12px 14px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:#FAFAF8;
  color:var(--ink);
  resize:vertical;
}
.quote-form input:focus,
.quote-form select:focus,
.quote-form textarea:focus{
  outline:none;
  border-color:var(--ink);
}
.form-note{
  margin-top:16px;
  font-size:12.5px;
  color:var(--muted);
  text-align:center;
}

/* ---------- Footer ---------- */
.site-footer{
  background:var(--dark);
  color:var(--muted-on-dark);
  padding:52px 0 32px;
}
.footer-top{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding-bottom:30px;
  border-bottom:1px solid rgba(255,255,255,.1);
  margin-bottom:26px;
}
.site-footer .logo{ color:#fff; }
.footer-cta{ display:flex; gap:10px; }
.footer-info{ font-size:13px; line-height:1.9; }
.footer-copy{ font-size:12px; margin-top:18px; color:rgba(255,255,255,.45); }

/* ---------- Mobile float call button ---------- */
.mobile-float{
  display:none;
  position:fixed;
  right:20px; bottom:20px;
  width:54px; height:54px;
  border-radius:50%;
  background:var(--accent);
  color:#fff;
  align-items:center;
  justify-content:center;
  box-shadow:0 10px 24px rgba(20,20,20,.28);
  z-index:90;
}
.mobile-float svg{ width:22px; height:22px; }

/* ==========================================================
   Responsive
   ========================================================== */
@media (max-width:960px){
  .pain-list{ grid-template-columns:repeat(2,1fr); }
  .service-grid{ grid-template-columns:repeat(2,1fr); }
  .process-list{ grid-template-columns:repeat(3,1fr); }
  .works-grid{ grid-template-columns:repeat(2,1fr); }
  .price-grid{ grid-template-columns:1fr; max-width:420px; }
  .trust-inner{ grid-template-columns:1fr; gap:32px; }
  .contact-channels{ grid-template-columns:1fr; }
}

@media (max-width:768px){
  .only-pc{ display:none; }
  .gnb, .header-cta{ display:none; }
  .hamburger{ display:flex; }
  .hero{ min-height:auto; padding:120px 0 72px; }
  .hero h1{ font-size:32px; }
  .section{ padding:72px 0; }
  .section-title{ font-size:25px; }
  .pain-list{ grid-template-columns:1fr; }
  .process-list{ grid-template-columns:1fr 1fr; }
  .trust-list{ grid-template-columns:1fr; }
  .works-grid{ grid-template-columns:1fr; }
  .form-row{ grid-template-columns:1fr; }
  .footer-top{ flex-direction:column; gap:18px; align-items:flex-start; }
  .mobile-float{ display:flex; }
}